I like dogs but i own a cat well the cat owns me
Stupidity and intelligence are opposite ends of a very long line. Most of us dwell somewhere in the middle. On a good day we're smart; on a bad day we may do something completely off base.
I think there are all sorts of people in the world. Who is unintelligent or "stupid" is often very subjective based on the opinion of whomever is doing that type of judging.